I am completely new to chickens (or birds in general). My first flock is 8 weeks old now. I just noticed tonight that one of my birds had a slight runny nose and let out a small sneeze. I then got paranoid and checked all the other birds who were completely fine. I suppose it's possible that she just took a drink of water and got some in her nose. But to be safe, is there anything I should watch for? Do I need to separate her from the rest of the girls? Help a new girl out please!!